I had the day off today and had the urge to do something to one of my cars so I decided to swap the cluster bulbs out for LED's on the Miata.
It's a pretty simple procedure.
1: Remove the upper half of the cover around the signal light stocks or whatever you call em.
2: Remove two screws under the cluster hood.
3: Pull the hood straight towards you and hope that you don't break all of clips (I only broke one, still holds tight though).
4: Remove 4 screws (two on top and two on bottom) holding the cluster in.
5: Unplug 3 harnesses, the speedometer cable and remove the cluster.
6: Twist and remove the 4 big green bulbs from the back of the cluster.
7: Swap in the LED bulbs and hope that you put them in the right way as LED's only work one way.
8: Reverse to install.
One thing to note is when I first put the cluster back in I noticed that the gas gauge was very dim. I eventually realized that there are two wires that go from the gauge face, through the cluster and out the back. These two wires were in front of the LED that lit that part of the cluster up. Simply move it over and everything lights up properly.
I was hoping that replacing the bulbs would make the entire cluster light up white but I found out that the faces themselves have a green film glued on to the back of them. So, I guess that gives me an excuse to order some Revlimiter gauge faces
Here are some photos of the process.
And now here are some before and after pictures. First set are with the garage lights on and the second set are in the dark.